Condensed Consolidated Schedule of Investments (Securities) (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Corporate Bonds [Member] | National Australia Bank, Floating Note (cost $1,504,227) [Member]
Investment Holdings [Line Items]
Cost of investment	$ 1,504,227
Corporate Bonds [Member] | Verizon Communications, 5.25% (cost $1,025,412) [Member]
Investment Holdings [Line Items]
Cost of investment	1,025,412
Interest rate	5.25%
Corporate Bonds [Member] | Citigroup Inc., 5.50% (cost $1,026,283) [Member]
Investment Holdings [Line Items]
Cost of investment	1,026,283
Interest rate	5.50%
Corporate Bonds [Member] | HSBC, 4.75% (cost $766,151) [Member]
Investment Holdings [Line Items]
Cost of investment	766,151
Interest rate	4.75%
Corporate Bonds [Member] | Prudential Financial, Inc., 4.50% (cost $765,417) [Member]
Investment Holdings [Line Items]
Cost of investment	765,417
Interest rate	4.50%
Commercial Paper [Member] | Suncorp Metway Ltd., (cost $997,443 and $999,542, respectively) [Member]
Investment Holdings [Line Items]
Cost of investment	997,443	999,542
Commercial Paper [Member] | Banco De Chile, (cost $999,222) [Member]
Investment Holdings [Line Items]
Cost of investment	999,222
Commercial Paper [Member] | Kookmin Bank, (cost $999,138) [Member]
Investment Holdings [Line Items]
Cost of investment	999,138
Commercial Paper [Member] | Korea Development Bank, (cost $998,050 and $999,316, respectively) [Member]
Investment Holdings [Line Items]
Cost of investment	998,050	999,316
Commercial Paper [Member] | Nextera Energy Capital Holdings, (cost $999,611) [Member]
Investment Holdings [Line Items]
Cost of investment	999,611
Government Agencies [Member] | Federal Home Loan Bank, 0.3-0.45%, (cost $1,000,000 and $2,000,000, respectively) [Member]
Investment Holdings [Line Items]
Cost of investment	1,000,000	2,000,000
Government Agencies [Member] | Federal Home Loan Bank, 0.3-0.45%, (cost $1,000,000 and $2,000,000, respectively) [Member] | Minimum [Member]
Investment Holdings [Line Items]
Interest rate	0.30%
Government Agencies [Member] | Federal Home Loan Bank, 0.3-0.45%, (cost $1,000,000 and $2,000,000, respectively) [Member] | Maximum [Member]
Investment Holdings [Line Items]
Interest rate	0.45%
Government Agencies [Member] | Freddie Mac Bond, 0.35% (cost $2,000,084 and $2,000,084, respectively) [Member]
Investment Holdings [Line Items]
Cost of investment	2,000,084	2,000,084
Interest rate	0.35%
Government Agencies [Member] | Freddie Mac Note, 0.5% (cost $1,500,000) [Member]
Investment Holdings [Line Items]
Cost of investment	1,500,000
Interest rate	0.50%
Government Agencies [Member] | Fannie Mae, 0.55-0.65% (cost $1,250,000) [Member]
Investment Holdings [Line Items]
Cost of investment	1,250,000
Government Agencies [Member] | Fannie Mae, 0.55-0.65% (cost $1,250,000) [Member] | Minimum [Member]
Investment Holdings [Line Items]
Interest rate	0.55%
Government Agencies [Member] | Fannie Mae, 0.55-0.65% (cost $1,250,000) [Member] | Maximum [Member]
Investment Holdings [Line Items]
Interest rate	0.65%
Short-Term Investment Funds [Member] | Short-Term Investment Funds (cost $3,200 and $3,600, respectively) [Member]
Investment Holdings [Line Items]
Cost of investment	3,200
Total Fixed Income Securities [Member]
Investment Holdings [Line Items]
Cost of investment	10,831,178	11,005,602
Investment in Global Diversified Managed Futures Portfolio LLC [Member]
Investment Holdings [Line Items]
Cost of investment	$ 680,000